fix overlap check when ingress is configured as canary (#7719) (#7741)

Co-authored-by: Alan <[email protected]>

Author: rikatz

internal/ingress/controller/controller.go

@@ -1680,7 +1680,7 @@ func checkOverlap(ing *networking.Ingress, ingresses []*ingress.Ingress, servers
 					return fmt.Errorf(`host "%s" and path "%s" is already defined in ingress %s/%s`, rule.Host, path.Path, existing.Namespace, existing.Name)
 				}
 
-				if annotationErr == errors.ErrMissingAnnotations && existingAnnotationErr == existingAnnotationErr {
+				if annotationErr == errors.ErrMissingAnnotations && existingAnnotationErr == errors.ErrMissingAnnotations {
 					return fmt.Errorf(`host "%s" and path "%s" is already defined in ingress %s/%s`, rule.Host, path.Path, existing.Namespace, existing.Name)
 				}
 			}